Adjusting device for rock-drills.



A. L. BOLSON.

ADJUSTING DEVICE FOR ROCK DRILLS.

A P P L I C A T 0 N F l L E D 1 U L Y 2 0 l l 9 l 4.

I Ll@ Pafentedsept. 28, 1915.

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ADIUSIING DEVICE FOR ROCK DRILLS.

APPLICATION FILED IUD/20. I3I4.

Invntffdept. 28, 1915.

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DJ'USTING DEVICE FOR ROCK-DLS.

Specication of Letters Patent.

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Application led July 20, 1914. Serial No. 851,914.

It consists in a device ,or carriage guided and movable upon the supporting column and adapted to 'raise or lower the arm upon which the drill is carried, and to adjust it to any desired relative position. It is designed for use in shafts or tunnels, where the operating space is exceedingly limited, to enable a single operator to raise, lower and adjust the heavy drilling apparatus without the necessity of employing several men.

The invention also comprises details of construction which will be more fully explained by reference to the accompanying drawings in which- Figure 1 is a front elevation of the jack. Fig. 2 is a side elevation of same. Fig. 3 is a cross section on line 3--3 of Fig. 2. Fig. 4 is a cross section on line 4 4 of Fig. 2. Fig. 5 is a top view showing the pivot arm. Fig. 6 is an elevation of the device applied to a supporting column.

A represents the column which is adapted to be rigidly xed in the shaft or tunnel in which the work is to be carried on by means of extending clamps in the usual manner.

2 is an arm having at one end a clampin device 3 by which it may be firmly clampe upon the column A at any point where it is desired to operate, and this arm carries a drilling mechanism, which is indicated at 4 and which may be adjusted and clamped upon the bar 2 so as to aline the drill properly with relation to the hole to be drilled.

In order. to raise, lower and adjust the drill and its supporting arm, so that a single person can operate it, l have shown a carriage guided and slidable upon the column and having an independently Aadjustable support for the arm 2. This carriage consists of a bracket arm 5, preferably bent as shown, having one end. as 6, carried in a clamp which fits around the column A and may be secured thereto by a clamping bolt and nut, as at The lower end 6a of this bracket arm 5 1s turnable in a semicircular end 8 which fits against and is slidable upon the column at 'a considerable distance below the clamp 6, so that when the device is loosened it may be raised or lowered and guided upon the column, without binding when weighted to one side of its line of travel. Y

9 is a socket in line with a corresponding socket in the part 7, and through this socket a shaft or stem 10 is slidable. The upper end .of this shaft is provided with a supporting head 11, upon which the bar 2 may rest and by which, when the clamp 3 of said bar has been released, the bar and the drill A mechanism carried thereon may be raised or lowered with reference to the supporting bracket when the bar is supported upon the head -11.

In order to raise or lower the drill mechanism and its support, I have shown a device consisting of a lever 12 fulcrumed to the bracket arm 5, as shown at 13. The shortV inner end of this lever is connected by a link 14v with a clutch 15, which is slidable upon the shaft 10 when axially in line therewith, but which, when tilted, will bind upon the shaft and by the action of the lever will raise the shaft, head 11 and the parts carried thereby.

Below and pivoted to the portion 8a, which is slidable upon the column, is another clutching device 16 which is so swiveled that, when the clutch 15 is operated to raise the shaft 10, it will allow the shaft to move freely through the clutching device 16, but when the lever 12 is moved so as to depress the clutch 15, the clutch 16 will bind and hold the shaft 10 while another movement of the lever takes place. It will be understood that any equivalent ratchet mechanism may be employed for this. purpose; the object being to provide an adjustable bracket upon which a clutch or ratchet mechanism is carried and which is movable therewith so that the drill mechanism may be shifted to any point from the top tothe bottom of the column and may also be turned thereon so that the drill can be directed to any point where it is desired to drill a hole. It will thus be seen that, when the clamp 7, which holds the bracket mechanism, is tightened to secure said mechanism rmly to the column, the shaft 10 may be raised into contact with the bar 2. The

clamp 3 being then released, the lever may' b e operated to either raise or lowerthe bar and its supported drill according to requirements. v

The 'lower end of the bar 10 has formed upon it an eye or equivalent device 10a to which a chain or rope may be attached. This will be operative when the bracket 5 is moved vto the top of the column and the drill is lto be supported below the bracket. The chain may thenbe passed .through the eye 10aL and around the shaft 2 when the operation ofthe parts will be alected in the vsame manner as above described'.

'A great advantage of a device of this sort is the ability to operate the heavy drilling mechanism by the aid of one man who can attend to allof the work and thus dispense with the additional cost of an extraman to help raise or lower and adjust the mechanism.

In order to allow the lever to toeither side, the bracket arm 5, by reason of its swivel ends 6 and 6, may be 'readily moved so that the lever may stand in any desired relation with the drill and column.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In combination with a vertical support,

be turned riage to the support, vertically adjustable means borne by the carriage and engageable with a mechanism adapted to be slidablysecured vto the support andalsolocked thereto to raise or lower the mechanism, and means associated with the carriage for raising or lowering said verticallyadjustable means at spaced intervals of time and therewith' the mechanism while the carriage remains stationary. f .Y

3. In combination with a vertical support, a carriage adjustable on the support and having means to. lock same rigid on the support, and meanslassociated with the carria e and movable independently thereof an engageable with a mechanism adapted to be slidabl also locked t creto for periodically raising secured to the support andv or lowering the mechanism while the car- Y riage remains stationary.

4. In combination wi port, a carriage slidable on the support, means to lock the'carriage to the support, and a raising and loweringV device on the carriage engageable beneath a mechanism that is adapted to be slidably mounted on the support, said mechanism beingcapable of being locked to the support-whereby the mechanism upon release of its lock may be raised by said Adevice then locked to the support, the device lowered, the carriage unlocked and raised, relocked to the support and the device again raised to further elevate the mechanism upon further unlocking of the latter.

In testimony whereof I have ,hereunto'set my hand in the presence of two subscribing witnesses.

ABERHAM L. Y BOLSON.

.Witnessesz JOHN H. HERRING, W. W. HEALEY.

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